4015144:2-(187864+243*294):12:6=
578160:2-(187864+72*294):12:6
==>578160:2-(70992+21168):12:6
==>578160:2-92160:12:6
==>578160:2-7680:6
==>578160:2-1280
==>289080-1280
==>287800
4015144:2-(187864+243*294):12:6=
578160:2-(187864+72*294):12:6
==>
578160:2-(70992+21168):12:6
==>
578160:2-92160:12:6
==>
578160:2-7680:6
==>
578160:2-1280
==>
289080-1280
==>
287800